Well, I'm not Frank either, but can be quite him too. I go there at least once a month for lunch on weekdays and always find a nice seat at the bar when I'm alone, or sometimes a shared table when I'm with company ... no wait, ever.

If you're eating solo during a weekend, a bar seat is almost always available at any time.

The menu is quite different on weekdays than on weekends, so you might want to take a look at their menu online before you decide when to go. Weekends are also more crowded. The rotisserie duck is more expensive on the weekends, but they do have a nice prix fixe lunch on the weekends. (no prices on the Momofuku website.)